The Hollywood actor and Sienna Miller found it difficult to go to the toilet while shooting the movie because they were wearing tight leather outfits - so they placed bets on who would last the longest with relieving themselves.

He said: "It was uncomfortable and hot in those suits and pretty hard to go to the bathroom."

"It ended up with us making a game of how long we could hold it and who would give in first. I didn't win!"

Sienna has previously revealed she had to be wheeled around the set of "G.I. Joe..." because it was impossible to move in her skintight costume.

She said: "At four o'clock in the morning, squeezing into leather is not the most fun. I couldn't breathe. It was all heavily corseted, very tight and held up with straps."

"I couldn't move very easily. I wanted to burn it. We were going to have a little ceremonial burning of all the wardrobe."

"I couldn't move in my wardrobe very easily and I couldn't sit down, so I had what looks like an ironing board on wheels with arms like that thing Hannibal Lecter gets wheeled in on in 'Silence of the Lambs'. It was funny but very uncomfortable."